https://llvm.org/bugs/show_bug.cgi?id=23649
Bug ID: 23649
Summary: libLLVM-3.7.so doesn't work when building with cmake
on linux
Product: Build scripts
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: cmake
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Trying to build LLVM+clang on Linux with cmake fails to generate a working
libLLVM-3.7.so (an autoconf build works).
The build generates libLLVM.so.3.7, but the file is much smaller than with the
autoconf build (8 kB vs. 2.8 MB), and llvm-c-test fails to link:
FAILED: : && /usr/bin/clang -Oz -Wa,--compress-debug-sections -gdwarf-4
-Wstrict-aliasing=2 -pipe -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2
-fstack-protector --param=ssp-buffer-size=4 -fPIC -g0 -fPIC -Wall -W
-Wno-unused-parameter -Wwrite-strings -Wmissing-field-initializers -pedantic
-Wno-long-long -Wcovered-switch-default -Wno-comment -fcolor-diagnostics
-ffunction-sections -fdata-sections -std=gnu99 -Wstrict-prototypes -O3 -DNDEBUG
-Wl,-allow-shlib-undefined -Wl,-O3 -Wl,--gc-sections
tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/calc.c.o
tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/disassemble.c.o
tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/helpers.c.o
tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/include-all.c.o
tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/main.c.o
tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/module.c.o
tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/metadata.c.o
tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/object.c.o
tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/targets.c.o -o bin/llvm-c-test
-rdynamic lib64/libLLVM.so.3.7.0svn && :
clang: warning: argument unused during compilation:
'-Wa,--compress-debug-sections'
tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/calc.c.o:/home/bero/abf/llvm/BUILD/llvm-3.7.0.src/tools/llvm-c-test/calc.c:function
handle_line: error: undefined reference to 'LLVMModuleCreateWithName'
tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/calc.c.o:/home/bero/abf/llvm/BUILD/llvm-3.7.0.src/tools/llvm-c-test/calc.c:function
handle_line: error: undefined reference to 'LLVMInt64Type'
tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/calc.c.o:/home/bero/abf/llvm/BUILD/llvm-3.7.0.src/tools/llvm-c-test/calc.c:function
handle_line: error: undefined reference to 'LLVMPointerType'
[... way more undefined references ...]
The rest of the build is ok, without -DLLVM_BUILD_LLVM_DYLIB:BOOL=ON, I get a
working clang compiler.
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